Drafting pen



H. FRANK DHAFTING PEN Oct. 4, 1949.

Filed Oct. 4, 1946 FIG.I

FIG. 4

. I INVENTOR. .HENRY FRANK FIG. 3

FIG; 2

710%, QAMQZ ATTORNEY Patented Oct. 4, 1949 DRAFTING PEN Henry Frank, Brooklyn, N. Y.

Application October 4, 1946, Serial No. 701,344 7 Claims. (Cl.120-109.5)

This invention is an improvement in pens, and more particularly a pen for draftsmen, of such a character that it requires no quill to charge it with the writing fluid, but can be made ready for use simply by dipping the point thereof; the construction being such that a material quantity of the writing fluid will then be retained by V the pen and gradually consumed in operation.

An important object of the invention is to provide a draftsmans pen having an indentation which can be filled when necessary, and afterward effectually sealed to serve as a reservoir, from which the contents have no egress save at the parts of the pen which are employed for inscribing.

A further object is to provide a draftsmans pen having a movable shield mounted upon the body or member containing the reservoir and adapted to cooperate with other parts of the pen to close the reservoir; and so disposed as to serve when the implement is handled, to prevent any of the writing fluid from soiling the fingers.

Another object is to provide a pen having a reservoir and shield with parts for holding in position a, replaceable element with a suitable point adjacent the lower part of the reservoir,

said point being shaped to discharge the Writing fluid upon a prepared surface in the quantity required for the lines to be made by the pen.

The nature of the invention is fully disclosed in the ensuing description, and the novel features are pointed out in the appended claims. This disclosure, however, is explanatory only, and

changes in details of shape, size and arrangement of parts may be adopted Without deviating from the essential construction which characterizes the invention.

In the drawings I Figure 1 is a side view of a'draftsmans reservoir pen, according to this invention.

Figure 2 is a rear view of the body of the pen in which the reservoir is contained.

Figures 3 and 4 are side and face views of the working point for the'pen.

Figure 5 is a rear view of the shield for the pen, and a part of the body which is covered by same.

Figure 6 is a front elevation of a different form of pen containin the invention.

The pen comprises an elongated body I having in its rear face a cavity or recess 2 to serve as a reservoir, which extends from about the middle of the member I to the lower extremity thereof. As shown in Figures 1, 2 and 5, the rear face of the member I is flat throughout, and this member is tapered or beveled along the lower part at 2 the front and sides as indicated at 3, and comes to a point 4 of some slight width at the extremity thereof. The recess 2 is similar in shape. The

body I can be rounded, or semicylindrical in cross section, or have'some other shape, such as square or triangular, for example. To this member I is attached handle l8 of suitable length.

Pivoted to the member i hear the junction of the same with the handle. 18 is achannel-shaped cover or shield 5 attached to the sides of the member I by a pivot pin 6 fixed thereto. This shield covers the front and sides and the tapered or beveled terminal portion 3' thereof, and has a correspondingly tapered shape to fit the tapered part 3 of the body 'I. The shield 5 isslightly wider than the member I, and the sides of the shield are separated by narrow spaces from the sides thereof, the rear edges of the sides of the cover or shield being bent over to form flanges 8 for a part of the length of these edges, and the ends of the pivot pin may have shoulders abutting the inner faces of th sides of the shield to hold the latter with the body centered therein. a

The pen is charged with ink by lifting the shield and dipping the member I into the ink so as to admit one or more drops to the recess 2. The shield is then swung down against the member l, and a pen element or nib 1 is inserted between the flanges 8 and the rear face of the member I to close the reservoir 2. This element is tapered over about half its length, as indicated at 9. It overlaps the flat rear face of the member I, along its edges for virtually its whole length, and at the end, on its inner face, it has a longitudinal groove II. The element 1 has its upper,

end 12 turned over outward to engage the flanges 8 at the sides of the shield and when the end is in such position, the lower extremity of the nib or element 7 projects a little beyond the slotted.

end of the member I. [The flanges 8 and I2 hold the nib in place and the ink is allowed to escape from the reservoir 2 by Way of the groove H on the inner face of the nib 9. ,The lower end 9 of the nib T has its edges substantially flush with the sides of the adjacent end 4 of the member I Inoperation the shield '5 is lifted by the knob,

the ends of the flanges. The pen can then be used to draw lines because the ink will trickle down through the groove II to the paper.

The pen can be used with a set of nibs I having grooves II in the ends thereof of Varying width and depth. In this way lines of greater or less thickness can be drawn.

As above described, the shield 5 has to be wider than the body I, whatever is the cross sectional shape of the latter, because the flanges 8 are relied upon to secure the element I in operative position, and there must be space enough between the flanges 8 to clear the sides of the member I when the shield is swung up to the front, as indicated in broken lines on Figure 1,

and the pend is dipped. If this cover 5 is not lifted, the lower end thereof .will have ink on the outer surface and the draftsmans fingers will be smeared with it. In Figure 6, another form is illustrated having a shield 5' of approximately the same width as the member'l, that is, no wider inside than is necessary to admit the member I. This member can be semicylindrical, or triangular or four sided in cross section, and the shield will be channel-shaped and will envelop the member I snugly in front and at both sides, with the flanges 8 overlapping the member in the back. In one side of the member I is a bore I4 containing a coiled compression spring I5 and a small catch plug I6. In the adjacent side of the shield is an aperture I7 to register with the plug IS. The rim of the bore at the entrance will be peened at one or more points to permit the catch plug to project slightly, but prevent full expulsion. Its rounded or tapered outer end Will fill the opening I! when the shield is slipped upon the body I and hold it in place, and the nib I can be attached as before by pushing it under the rear flanges 8. To remove the shield one needs only to press the catch plug in with a pencil point or finger nail far enough to release the shield 5', and then it can be pulled off and the point 3 of the body I dipped as before. Then the shield is replaced, slipping past the catch and being retained thereby in assembled relation with respect to the body I. A more compact model is thus obtained. After dipping, the lower end of the body can be wiped, if desired, or the shield can be replaced without wiping. In either case the operators fingers are pro-: tected.

The lower end 3* of the body I can be split as at I 9 to cooperate with the groove I I. To attach the handle I8 the latter may be screwed upon a threaded shank at the upper extremity of the member I.

.The pen is thus very simple in construction. It can be used to advantage and in comfort, without the operator soiling his fingers, and can be employed for light or heavy work merely by inserting the right element into position. The design above described thus realizes all the objects of the invention.

Having described my invention, what I believe to be new is:

l. A pen having a body with a recess in one side and opening through one end, a shield attached to the body and shaped to cover the interim thereof adjacent to said end except said recess, and an element secured to the said body by said shield, said element covering said recess, and having an operating point for the purpose set forth.

2. The pen according to claim 1, wherein said shield and said element are movable to uncover said body.

3. A pen having a body with a recess open at the rear face thereof, the body being tapered at its lower portion along the front and sides, the recess opening through the end of the tapered portion, a shield attached to the body and shaped to cover the front and sides and the tapered lower portions thereof, and an element secured to the rear face of the body by said shield in position to cover said recess, said element having converging sides at the lower portion and terminating in a point with a groove on its inner face communicating with said recess, said shield and said element being movable to uncover the recess.

4. A pen having a body with a recess opening through its rear face, said body being tapered along the lower portion of the front and sides, and the recess extending to the end of said portion, a channel-shaped shield attached to the body, and similar in outlinethereto, said shield having its sides separated from the sides of said body and having flanges along the rear edges of the sides, the distance of said flanges from one another being slightly greater than the width of said body; and a replaceable pen element disposed against the rear face of said body and held against said face by said flanges, said element having converging edges at its lower portion and terminating in a point with a groove on the inner face thereof at the lower end of the recess.

5. The pen according to claim 4 in which both the shield and pen element are movably se cured to the body so that the body and recess can be uncovered when said shield and element are displaced.

6. The pen according to claim 4 in which the shield is pivotally attached to the sides of the body and the pen is slidable into and out of position, so that the body can be exposed to uncover said reservoir.

7. The pen according to claim 3 wherein said shield has flanges overlapping the rear edges of the body to receive said element and hold it along the opposite edges, the shield having an opening and the body carrying a catch plug which releasably engages said body at said openmg.

HENRY FRANK.

REFERENCES CITED The following references are of record in the file of this patent: 

